I had this exact issue recently. I attempted to manually install a number of the drivers, including Vista-patched drivers, around on the Internet but Windows 7 would automatically remove the driver upon reboot.

I later found that you can use the standard Windows XP driver if you run the setup program in XP compatibility mode. The driver will install, but it still will not be able to detect the connected monitor, so you'll have to resort to standard screen resolutions, such as 1280x1024 or 1024x768.